23256-39-5 4-Guanidinobutanamide hydrochloride 4-Guanidinobutyramide monohydrochloride Augmentin Butanamide, 4-((aminoiminomethyl)amino)-, monohydrochloride Butyramide, 4-guanidino-, monohydrochloride HL 523 TIFORMIN HYDROCHLORIDE Tyformin hydrochloride